Bucket lip extension



Aug. 23, 1932. D. H. YOUNG BUCKET LIP EXTENSION Filed March 21, 1932 2 Sheets-Sheet l I www Aug. 23, 1932.

D. H. YOUNG BUCKET LIP EXTENSION Filed March 21, 1932 2 Sheets-Sheet w, 7a Z M y 2 Patented Aug. 23, 1932 UNITED STATES PATENT OFFICE DONALD E. YOUNG, OF BERKELEY, CALIFORNIA, ASSIGNOR TO AMERICAN MANGANESE STEEL COMPANY, OF CHICAGO HEIGHTS, ILLINOIS, A CORPORATION OF MAINE BUCKET LIP Application filed March 21,

While particularly applicable to and illustrated in connection with an excavating bucket of the kind intended to be assembled in an endless chain'traveling through and elevating subdivided material to a place of discharge, the present invention is applicable to, and the term bucket herein employed is intended to also include, excavatin dippers, scrapers and the like.

t is customary to armor the walls which provide front and side confines of the forwardl presented open mouth of a bucket of this kind by applying thereto a digging lip; and for structural and funetional reasons, in applying such lip, it is desirable to lap it u on the exterior of the front and side walls 0 the body portion and design it with inherent thickness onyflare forward of the mouth sufficient to cut a path that will large- 1y free the body of the dipper from suction or drag in traversing the material. These conditions, in turn, especially when coupled with a spheroidal form of bucket body that necessitates the use of a lip having side portions which can swing forwardly into assembly, leave the interior faces of the side confines of the bucket, as well as the inner heads of the lip-securing rivets, exposed to wear that is so excessive as to unduly shorten so the life of the bucket.

The present invention aims to counteract the undue wear referred to, and proceeds upon the principle of equipping the bucket with not only a digging llp having front and sides conforming to the front and side confines of the mouth, but lip extensions fitted upon the inner faces of the side portions of the lip and overhanging the forward narrow faces of -the body side walls in a manner to protect the latter from the impact of material entering the bucket. These lip extensions are separately formed and riveted in place because of the decreasing perimetrieal dimension of the spheroidal body from its mouth rearwardly that necessitates the before-mentioned forward movement assembly of the sides of the lip. The peculiar movement incident to assembly does not, however, prevent the use of an integral shoulder upon the intermediate portion of EXTENSION 1932. SerialINo. 600,138.

the lip. Hence, in the preferred construction, when assembly is complete; that is to say, when the separately formed lip exten- SlOIlS are riveted in place, the lip will be in shouldered abutment with the side and front confines of the body wall throughout substantially its entire length. The lip extensions are preferably of greater dimension than the thickness of the side walls, so that material entering the bucket is cascaded past the forward margin of the mouth and does not impinge severely against the inner surface.

In the accompanying drawings, in which the preferred embodiment of the invention is shown by way of illustration- Figure 1 is a perspective view of a bucket embodying the invention.

Figure 2 is a medial longitudinal section thereof.

Figure 3 is one-half of an elevational aspect viewed in a picture plane indicated by the line 33 of Figure 2.

Figure 4 is a similar view in a picture planedindicated by the line 4-4 of Figure 2; an

Figure 5 is a detail view in a section on the line 5w-5w of Figure 2.

1 represents the body of the bucket which carries the usual articulating hub 2 and ears 3, which body is of spheroidal design and in eludes a front wall 4 and side walls 5 providing front and lateral confines of a forwardly presented open mouth having a narrow lipabutting surface 6. To protect the body portion from wear and provide an enlarged excavating area, the bucket is provided with a lip 7 applied exteriorly to thefront and side walls 4, 5 and there secured by suitable means, such as rivets 8. Lip 7 as shown more clearly in Figure 2, may bedesigned with the usual internal shoulder 9 through means of which, in addition to beingstepped upon the body at 10, it may stand in abutment with or at least oppose the forward narrow face 6. Assembly of lip 7 with body 1 will be accompanied by a movement having as one of its components a forward swinging of the free ends or side portions 11 of the lip in bringing them up from a relatively smaller rear portion of the 100 spheroidal form to the maximum dimension thereof, thus necessitating the omission of obstruction on the inner face of the sides of the lip and leaving badlyexposed to wear the forward edge 6 of the body portion. In order to protect this edge 6 and marginal portions of the side walls adjacent the month, separately formed lip extensions 12 are fitted to the inner faces of the sides of the lip forward of the surface 6, and in position to lap upon said surface (3 and preferably also overhang the same so as to provide a deflecting portion 12a (Figure 5) which will have a cascading effect upon the incoming material.

Lip extensions 12 are countersunk or recessed into the portion of the lip 7 which lies beyond the mouth of the body portion, as shown in Figure 5, but this portion of the lip is deflected or flared outwardly, so that a lip extension receives the material at an angle of incidence which, while low, is sufficient to insure the deflection referred to.

-VVhen the lip extensions are introduced as 'ward face (i throughout substantially the length of the lip.

Shear resistance on the rivets that secure the lip extension 12 in place may be relieved by the shoulder 12 at the apex of the lip extension.

What is claimed is:

1. An excavating bucket having front and side walls forming the confines of a forwardly presented open mouth, a digging lip having a front and sides conforming to said mouth, and separately formed lip-extensions overlying the inner faces of the side portions of the lip and protecting the sides of the said mouth.

2. An excavating bucket as described in claim 1, in which the side confines of the mouth have forwardly presented narrow faces, and the lip extensions overlap these narrow faces and extend beyond the same toward the interior of the bucket.

3. An excavating bucket as described in claim 1, in which the lip is lapped exteriorly upon the sidewalls of the dipper, the lip extensions overhang the forward faces of the s des of the mouth, and the lip extensions and side walls together present a thickness that I extends both inwardly and outwardly beyond the thickness of the side walls.

4. An excavating bucket as described in claim 1, in which the lip extensions are re cessed into the inner faces of the sides of the lip in advance of the side confines of the mouth.

5. An excavating bucket as described in claim 1, in which the lip is lapped exteriorly upon the side walls of the bucket and deflected outwardly beyond the side confines of the mouth, and the lip extensions are recessed into the deflected portions of the lip.

6. An excavating bucket as described in claim 1, in which the lip is lapped exteriorly upon the side walls of the bucket, and the lip extensions are opposed to the forward narrow faces of the sides of the mouth and are in shouldered forward abutment with the portion of the lip beyond the mouth.

7. An excavating bucket having'front and side walls forming confines of a forwardly.

opening mouth, a lip having sides lapped exteriorly upon the side walls and assembled therewith by a forward movement of the lip, and separately formed lip extensions secured interiorly to the sides of the lip, lapping upon the forwardly presented faces of the bucket sides and opposing relative movement of the lip on the bucket in theopposite direction.

8. An excavating bucket having walls forming the front and side confines of a forwardly presented open mouth, and a lip fitted exteriorly to said bucket and having side portions that assemble with the side walls by relative forward movement thereon, and internal shoulders in position to abut against the forward faces of said confines; the shoulder abutting the forward face of the front confine being integral with said lip and those abutting the side confines being separately formed and secured to the lip forward of the said mouth.

Signed at Oakland, Calif, this 1st day of 

